Method for ore dressing of bauxite

Abstract

The invention relates to an ore dressing method, in particular to a method for ore dressing of bauxite. The method for ore dressing of bauxite comprises the steps of ore grinding and flotation desulfurization. The method is characterized in that the treatment process comprises ore grinding, sediment filtering, bauxite dissolving out and flotation desulfurization; and ore is subject to grinding and synchronously subject to washing. The method guarantees safety of an industrial production flotation desulfurization device and can also effectively solve the problem of accumulation of sulfate radical in a system, good flotation desulfurization process technical indexes can be achieved, the method is suitable for any high-sulfur bauxite and particularly suitable for acidifying the high-sulfur bauxite, the environmental influence of the process is small, and the application prospect is optimistic.

Description

technical field [0001] The invention relates to a beneficiation method, in particular to a bauxite ore beneficiation method. Background technique [0002] With the rapid development of the alumina industry, the consumption of bauxite resources has risen sharply, the quality of bauxite has been deteriorating, and the degree of resource assurance has become increasingly severe. Production practices in recent years have shown that all or part of the use of high-impurity bauxite to produce oxidation The realities that aluminum has to face. [0003] For the utilization of sulfur-containing bauxite, there are many studies on flotation desulfurization and desulfurization in alumina process, and there are already examples of industrial implementation. But so far there is no large-scale application of high-sulfur bauxite in alumina production. The cost of desulfurization in the alumina process will increase exponentially, and the effect of desulfurization in the process will become...

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Problems solved by technology

But so far there is no large-scale application of high-sulfur bauxite in alumina production. The cost of desulfurization in the alumina process will increase exponentially, and the effect of desulfurization in the process will become worse, seriously affecting normal production and result in a decline in product quality

Flotation desulfurization can effectively prevent sulfur from entering the alumina process, but because the sulfur content of sulfur-containing bauxite and the instability of ore properties are not considered in industrialization, sulfur-containing bauxite is stored and processed after mining. , exposed to the air, it is easy to oxidize and acidify under humid conditions. The oxidative acidification of sulfur-containing bauxite in the flotation process determined by industrial production has a particularly serious impact on flotation desulfurization. On the one hand, due to the oxidation of acid, the ore If it is too acidic, it will cause serious equipment corrosion in the production process and increase the cost of equipment depreciation. On the other hand, to prevent acid corrosion, directly adopt the alkaline flotation desulfurization process, which will increase the difficulty and alkali consumption of flotation desulfurization, and make the flotation system alkaline Sulfate radicals gradually accumulate under these conditions, directly affecting the stability of the flotation process and causing an increase in the sulfur content of the aluminum concentrate

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